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1.
1). A bromance that is unhealthy for either party causing emotional or physical pain.

2). When bromance turns into something more.
1).

"Hey, you know the way John and David have been bromancing?"
"Yeah?"
"Well..don't you think it's turned David into a jackass?"
"Yeah man, total bad bromance!"

2).
"Hey man guess what?"
"What is it?"
"Those two guys in our year, way more than a bromance."
"Wooooah Bad Bromance dude!"
by Prince.Puck April 08, 2010